Automatic draft regulating device for boilers



Dec. 12, 1933. w BLASBERG 1,938,619

AUTOMATIC DRAFT REGULATING DEVICE FOR BOILERS Filed April 25, 1932 2 Sheets-Sheet l Dec. 12, 1933. w BLASBERG AUTOMATIC DRAFT REGULATING DEVICE FOR BOILERS Filed April 25, 1952 2 Sheets-Sheet 2 Mug Patented Dec 12 1933 v i ,938;61 9 I r I AUTOMATIC DRAFT REGULATING D VICE FOR BOILERS Wilhel1n Blasberg. Chicago,

11 'AppIication ApriIZS, 1932. Serial No. 607,421 I V 3 Claims (01. 236-26).

The invention relates to apparatusfor automatically regulating the opening and closing of the draft door and the chimney damper commonly provided on heating boilers close the draft door and, the chimney damper when a certain pressure has been obtained in the boiler'and to open the two again when the pressure in the boiler falls below the desired degree. v H I Another object of the invention is to make it possible to close or open the draft door tion with the chimney damper.

and the chimney damper of the heating boiler automatically either entirely or partly accord- ,in'gto the pressure desired in the boiler.

Other objects of the invention not specifically mentioned maybe easily ascertained and understood from the following'description in connectionwith the accompanying drawings forming a part thereof. It is howeverto be noted, that the invention is not to be limited and restricted to the exact formation and construction shown in the drawings and described inthe specification, but that the invention is only tobe limited by the scope of the claims appended hereto. N H

In the drawings illustrating a'preferred embodiment of the invention v Figure 1 is a front view of a heating boiler equipped with the automatic apparatus according the thepresent invention. l

Figure 2 is aside view indicating the connec- Figure 3 is a detail view of the regulating .vention showingthem in a position in which the ,draft door. and the chimneymdamper would be opened. t

. Figure 4 is a view similar to Figure 3 also showing a position in which the draft door and the chimney damper would be opened, but in this case chain. 28 is a few links shorter fastened. v

Figure 5 is a view. taken on line 55 in Figurer3. A boiler G'is equipped with the usual draft door '7 and'the usual chimney damper 8. The common practice is tolregulate these two}mem bers independently of. each other; namely, to regulate the draft door by means by a regulator .and the chimney damper by hand.' "This is sometimes inconvenient, especially when the fireman taking care of the boiler is not exclusively occupied therewith, but has some other duties to attend to,-so that he can'not'alwa'ys be right by'the boiler to watch it. To regulatethe opening and closing of the two said members a hanger .9 maybe fastened to the ceiling of the boiler roomin any desired and convenient manner. A pressure regulator 10 of a well known construction having a plunger 11. connected with Theobject of the invention is to automatically members. levers used in connection with the present ina membrane in the 'regulator 'is connected with the interiorof the boiler by means of a pipe'12.

A bracket 13 is rigidly fastened to the regulator or may beanintegral part thereof and extends upwardly of the regulator. An actuating lever M is pivotally mounted on the bracket '13 and the free. end oftheplunger 11v is pivotally fastened to the actuating lever 14. A counter weight 15 is adjustably mounted on the actuating lever and is arranged on thesame lever arm with the plunger connection in relation to the" fulcrum bracket 13. Adjacent the endof the other lever arm i. erthe end of that part of'the lever 14 on the other side of the fulcrum bracket a sheave 16 is rotatably mounted.

iron is-located as shown at 17 and is fastened to the hanger in any. suitable-and desired man- It is spaced J from the hanger by means of spacer blocks 18. In this bar and in A Along one edge of the hanger 9 a bar of flat the hanger 9 a plurality of corresponding holes f 19. are provided, A second bar 20 of .flat iron is fastened to the other side of the hanger and extends along the other longitudinal edge thereof Pas clearly shown in the drawings. 1 This second baris also kept at a distance from the hanger .bymeansof spacer blocks 21. The lever- 14 is located so that it extends between thesecond bar 20 and the hanger 9 and that the part of said lever located between these two parts may swing upwardly and. downwardly and will be guided in this movement by the two mentioned A regulatinglevel 22 ,is pivotally' mounted between the, hanger 9 and the flat iron bar 17. The :giulcrunrfor this lever is, indicated at 23. On

one end of the regulating. lever a counter weight 24 is arranged and the part adjacent thisweight islocated betweenthe flatbar 17 and: hanger 9. A cpin 25 is adapted to be inserted in a pair of corresponding holes 19 in the hanger and the fiat bar 17, so thattheswinging movementof the regulating lever may be limited by said pin.

Adjacent the "free end of the regulating lever -a plurality of holes 26 is provided for a purpose-1,

to be described later on. On the draft door .7

achain 28 isjfastened in'any suitable and convenient mannen Thefree end of this chainis then connected to the =regulating-lever 22'by means of a hook or .the like extending therethrough into one of the holes 26, Vso'that the be shortened and lengthened a will." a 'Inthe chimney pipe 29 the damperiis rotatably on one end of, said shaft which extends outwardworking length of the lever arm at the right :hand of the fulcrum in the drawings may rnountedbymeans Or shaft 30, or the like and i the lever? On the'ceilingoI the boiler groomi a chain? pulley 34 is arranged" and th' enemies is trained over this pulley.

A, manipulating lever 35 islpivotallv fastened to the hanger 9 as indicated 9.1736. and queer itsends extends between the flat bar l'l-andithe, hanger andflis providedwith a pluralitv' of holes" 10 37, to oneof whichthe nee end r thedaniper' chain 33 may be selectively fastened. The move"-' ment of the lever portion extending between thefiat iron bar. 17 and the hanger 9 may be'selec tively-limited by means of a pin 38,which can be" inserted infany pair of corresponding holes in the The sheave l6 ontthe aic tuating ever-1141 "10- *cated'so that it is arranged above the right hand i end in the drawings'of the adjusting gave; 22 and below the 'sameend of the "manipulating l s: The apparatus aceording to thepresent inven- ':tionworl{s as followsz V The pressure in the boiler 6 will aetuatethe membrane in the ,regnlator l which in turn, "will move the plunger ll upwardly with increasing pressureor downwardly with deereasing pressure iri the boiler. Upon upward movement of theplunger 11 sheave on the end of theadjustinglever 14 will engage the lever "22 and pivot the same so; that the oo'unter weight, 24- will be lifted and the endfof fthe lever on which the chain; 28 is fastened j'will jhove downwardly; "This 'imovement will permit the draft door 7 to move into closing positionby"its owr'i'weight;

Asthefpressure decreasesthe sheave endof thel flever-l4 wil1"move upwardly and the ,counter "and said hanger, a regulating. lever pivotallv w ghts; willlmove eownw 'mly lifting the ohain 2V8 upwardly whereby the draft door 2'7 will be 0; iorees the regulating lever 22 downwards, itgwill opened? At thesame time, 'thatthe sheave 1e be "disengaged from the manipulating lever and jherewith permit the weight "32 to] swing "downwardly thereby pivoting, the ;-chimney damper jinto closing position. j

, If, therefore; the pin 38 in FigureS is located inthe uppermost h'o1e 19 and the pin 25 is removed then the damper "be closed simultaneously,

lower'most" hole 19''- and the pin "25 is'firemoved thenthe damper 8 will stay open while thedraft If 'thepin 3a in Figure 3 is i serted in the door 2'7wi1l close under its" own weight.

If in Figure ethepinfia is inserted in the uppermo'stfho lel andthe pin 25 isarranged as shown i then the damper will be closed first and after that theoraft door will alsomove intoclosed position;

J'In "this casethe chain 28 should be shortened by a one last described case the heat in the boiler and prevent it' from esscription sno sjeiaiiy thattthe greejof closing andopening' ofsaid'members may Vibe adjusted and regulated bymeans' of the stop 7 7 p Z "-&Il 3 a iad i n o t a by me n of the varying length mama to which r the chains 28 and;33, respectivelyare iastenedr w fiaving described my invention andhow the mating lever and having' flexible eonneetion and the draft" door will actuated by said .regulaton an aetuatin eonntervveighton one end andq a sheavefiatthe "is the-most important 1 I-because it is possible inthis manner to keep all same operates I claimas newand desire to i lcure by Letters Patent i 1. In combination with a'boiler having a regulator connected with the interior thereof, 'a

draftdoorl and a chimney damper,jautomatic draft regulating -meanscomprising fa plunger, actuated by said regulator,- an actuating 'lever said plungenfl. a-han'ger, means carried by said],

hanger forguiding movement. ,Offthe sheaveend of the; said aetuatin'g .leveiyj a J regulating I lever ,pivotally mounted below saidaetiiating lever on said hanger and having flezgiblefconnection with said draft door; a manip lat ng1 vrifpivotally [mounted on saidjfhangerfhabove said 'a;;-

with said chimney damper; isaid av be ng {adapted tofengage one 'endof saidfregulating. and manipulating levers whereby movement of said' sh aveiwill serve to op damper and said draft door;

2. In combination with"aboilerhavinga regulator connected with theinter'ior thereof, a

draft door and a himney damper, automatic;

draft regulating 'means eornpr ising, a f plunger actuated bylsaid regulator, an actuating lever counterweight at one end and a sheave at the other end, said leveradapted to be pivotedby leverjbeingslidably mounted betweenfsaid 'bar V fmounted below said actuating lever onsaidhang- L; er and having. flexible Q connection jwith [said {-15 draft) door} a manipulating lever Ipivotally mounted on said hanger "above" said actuating lever and having-flexible connection withsaid :chimney damper, sheaveibeing adapted to j engage one end of said regulating and' manipua lating'levers vvhereby movement of said sheave will serve to open or closejsaid damper"and"said fiq q a 3; In eornbination with a boiler having-afreg draft door and a chimney dampen automatic draft reg ilating means comprising a pmn er;

pivotally. mounted on I said regulator h'av othefen'd, said leveradaptedto bepivoted saidplungerp a hanger; ,ayguide bar mounted.

"uponone face of said hangerand adapted to 'guide movement ,oithe sheave end of saidyaema er e u fiein c r v ta l mounted belowsaid actuating lever onlsaid 'hangerand having"fiexibleeonnection with slaid draft door; a 'manipulating lever "plvotally mounted on said hanger j a ov "saidjae uatingj lever and H having flexible connection with said oh imneyfdamper, a seeond guidiefjbl li ounted,

'upon the other face of saidhanger andyadapted H t guide, mq e en 01 a d a in enem nipulating levers, said sheave being adapted to engage one end of said regulating and rnanip'u lating f levers ,wher'ebyj movement of {said sheave qwill servel to open or c'lose said draft doohand 85] 2pivotally"mo unted :on said regulator having, a

en or close said 

